Over 10,000+ customers' choice, Focus on screening industry 40+ years
The screen frame, screen pans, discharge outlets and seals that come into direct contact with algae powder constitute the first cleanliness boundary in the impurity removal stage. Material-contact parts are typically made of 304 stainless steel, with the option of upgrading to 316L where corrosion resistance is required. Inner surfaces are mirror-polished, with surface roughness controlled within 0.4 μm, and weld seams are ground and passivated to reduce interface conditions that allow material to cling to walls and residue to accumulate. Non-metallic components such as sealing rings and bouncing balls use food-grade silicone, preventing aged or detached rubber parts from becoming a new source of foreign matter.
These configurations need to be understood within the compliance framework for food-contact materials. GB 4806.9—2023 sets limits for the migration of alloy elements from stainless steel used in food contact, with the lead limit tightened compared with the previous version and corresponding requirements also set for elements such as arsenic and cadmium. What equipment manufacturers can provide is material certification and surface treatment processes that connect with this standards framework, rather than replacing users in completing migration testing of finished products at the time of equipment delivery. In other words, a food-grade rotary vibratory sieve provides “traceable contact-material conditions”; compliance of the finished spirulina powder is still borne by the hygiene management and final inspection of the entire production line.
The impurity removal requirements for spirulina powder can be divided into two stages in process terms: one is retaining foreign matter and agglomerates clearly exceeding the target particle size, and the other is controlling the distribution of fine powder and oversize particles within the target particle-size range. The multilayer configuration of the rotary vibratory sieve corresponds precisely to this sequence. Screen apertures are arranged from coarse to fine, top to bottom. The upper screen deck performs a “protective retention” function, blocking large-particle foreign matter, undispersed agglomerates and possible fibrous impurities before they enter the fine screen mesh; the lower or middle screen deck then completes passage or retention within the target particle-size range.
Gaofu S49 series rotary vibratory sieves support 1 to 5 screen deck configurations and can simultaneously complete classification into 2 to 6 particle-size grades. Screen specifications cover 2–500 mesh, and processing capacity is adjusted within the 50–5,000 kg/h range according to material density and mesh count. The value of this configuration lies in the fact that impurity removal no longer relies on a single screen deck’s “pass or retain” decision; instead, through a division of labor among decks, foreign matter retention and particle-size control are handled separately. Coarse impurities retained by the upper deck do not repeatedly impact the fine screen mesh, and the permeability of the lower screen deck accordingly gains more stable working conditions.
The fineness and low bulk density of algae powder make dust escape an inherent tendency in the screening stage. The fully enclosed screen box, together with food-grade silicone sealing rings and clamp ring locking mechanisms, separates the screening chamber from the workshop environment, so fine dust does not escape outward and external foreign matter is prevented from entering the screening space during operation. For production lines with higher dust control requirements, a negative-pressure dust extraction port can be added at the feed inlet to further maintain a slight negative pressure inside the chamber.
The screen-cleaning method is related to whether impurity removal capability can be maintained over long periods. After absorbing moisture, algae powder tends to agglomerate on the screen surface, and fine powder and agglomerates gradually occupy the effective open area. Without intervention, impurity removal accuracy will decline with operating time. The bouncing-ball screen-cleaning device beneath the screen mesh continuously strikes the screen surface during vibration, using mechanical impact to break the embedding of agglomerates in the apertures. For operating conditions with higher fineness or stronger adhesion tendency, an ultrasonic screen-cleaning system can be selected as a supplement. The quick-release screen structure allows screen replacement to be completed within 3–5 minutes, providing executable time conditions for batch switching and routine cleaning.
For a rotary vibratory sieve to enter an algae powder deep-processing line, the interface conditions it must satisfy include at least the orientation and diameter of inlet and outlet ports, rhythm matching with upstream drying equipment and downstream packaging or mixing equipment, and integrability of operating status. Gaofu rotary vibratory sieves structurally support customization of inlet and outlet orientation and diameter, and can be equipped with inspection sight glasses, quick-release dust covers and dust extraction ports to adapt to different workshop layouts and automation linkage requirements. The equipment’s operating noise is controlled below 75 dB. For algae powder workshops with multiple pieces of equipment running continuously, this acoustic condition provides a basis for the screening stage to be embedded in the line without becoming an additional noise source.
It should be made clear that “fitting the production line” does not mean unconditional continuous operation. Bouncing balls are consumables subject to wear, screen meshes have a service life, and seals require regular inspection. These maintenance items should be incorporated into planned downtime arrangements at the production line design stage, rather than being handled passively after a visible decline in impurity removal performance occurs.
From compliance linkage of food-grade materials, to the coarse-fine division of labor among multilayer screens, and to the support that enclosed screen cleaning provides for continuous operation, the role of the spirulina rotary vibratory sieve in an algae powder deep-processing line is clear: it does not change the chemical composition of algae powder, nor does it replace hygiene management in drying, sterilization and packaging. However, at the screening stage, it can fix three tasks—foreign matter retention, particle-size control and dust containment—in a repeatable and maintainable manner. For spirulina powder that takes ash limits and hygiene indicators as its factory-release bottom line, this fixed set of process conditions is itself a link worth implementing in the deep-processing chain.
Pharmaceutical Industry Client Testimonials
Dong-E E-Jiao, Harbin Pharmaceutical Group, North China Pharmaceutical,Yangtze River Pharmaceutical Group, Taiji Group, Huadong Medicine,CSPC Group, Northeast Pharmaceutical, Guangzhou Baiyunshan, Tongrentang,Huiren Pharmaceutical, Fosun Pharma, Xiuzheng Pharmaceutical, Lijun Pharmaceutical,Luye Pharma Group, Di'ao Group, TianGongLi, Hengrui Medicine, Jiuzhitang, Jiangzhong Pharmaceutical, Lunan Pharmaceutical, Yunnan Baiyao, Sunflower Pharmaceutical,China Sanjiu Enterprise Group, Sanjin Pharmaceutical, Yiling Pharmaceutical,Wantong Pharmaceutical, Pientzehuang, Ma Yinglong Pharmaceutical, Guangyuyuan,Aodong Pharmaceutical, Besunyen, Jingfukang Pharmaceutical, Furen Pharmaceutical Group,Guizhou Bailing, Conba, Huasu Pharmaceutical, Yifang Pharmaceutical
Fortune 500 Client Testimonials
CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
